Diagnostic tester for biological fluids



FIG. 1 is a perspective view of a diagnostic tester for biological fluids showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof; and

FIG. 4 is a side elevational view thereof, the opposite side being a mirror image. 

The ornamental design for a diagnostic tester for biological fluids, as shown. 